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			<div id="docsContent">
				
<p><a href="../../../../editdocs#docs/tasks/administer-cluster/manage-resources/cpu-constraint-namespace.md" id="editPageButton">Edit This Page</a></p>

<h1>Configure Minimum and Maximum CPU Constraints for a Namespace</h1>




<p>This page shows how to set minimum and maximum values for the CPU resources used by Containers
and Pods in a namespace. You specify minimum and maximum CPU values in a
<a href="../../../../reference/generated/kubernetes-api/v1.11/index.html#limitrange-v1-core">LimitRange</a>
object. If a Pod does not meet the constraints imposed by the LimitRange, it cannot be created
in the namespace.</p>











<ul id="markdown-toc">










<li><a href="../../cpu-constraint-namespace/index.html#before-you-begin">Before you begin</a></li>












<li><a href="../../cpu-constraint-namespace/index.html#create-a-namespace">Create a namespace</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#create-a-limitrange-and-a-pod">Create a LimitRange and a Pod</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#delete-the-pod">Delete the Pod</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#attempt-to-create-a-pod-that-exceeds-the-maximum-cpu-constraint">Attempt to create a Pod that exceeds the maximum CPU constraint</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#attempt-to-create-a-pod-that-does-not-meet-the-minimum-cpu-request">Attempt to create a Pod that does not meet the minimum CPU request</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#create-a-pod-that-does-not-specify-any-cpu-request-or-limit">Create a Pod that does not specify any CPU request or limit</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#enforcement-of-minimum-and-maximum-cpu-constraints">Enforcement of minimum and maximum CPU constraints</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#motivation-for-minimum-and-maximum-cpu-constraints">Motivation for minimum and maximum CPU constraints</a></li>




<li><a href="../../cpu-constraint-namespace/index.html#clean-up">Clean up</a></li>




























<li><a href="../../cpu-constraint-namespace/index.html#what-s-next">What's next</a></li>



</ul>



<h2 id="before-you-begin">Before you begin</h2>
<p>You need to have a Kubernetes cluster, and the kubectl command-line tool must
be configured to communicate with your cluster. If you do not already have a
cluster, you can create one by using
<a href="../../../../getting-started-guides/minikube">Minikube</a>,
or you can use one of these Kubernetes playgrounds:</p>

<ul>
<li><a href="https://www.katacoda.com/courses/kubernetes/playground" target="_blank">Katacoda</a></li>
<li><a href="http://labs.play-with-k8s.com/" target="_blank">Play with Kubernetes</a></li>
</ul>
 

<p>To check the version, enter <code>kubectl version</code>.</p>

<p>Each node in your cluster must have at least 1 CPU.</p>




<h2 id="create-a-namespace">Create a namespace</h2>

<p>Create a namespace so that the resources you create in this exercise are
isolated from the rest of your cluster.</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create namespace constraints-cpu-example</code></pre></div>
<h2 id="create-a-limitrange-and-a-pod">Create a LimitRange and a Pod</h2>

<p>Here&rsquo;s the configuration file for a LimitRange:</p>

<table class="includecode" id="cpu-constraints-yaml">
    <thead>
        <tr>
            <th>
                <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraints.yaml" download="cpu-constraints.yaml">
                    <code>cpu-constraints.yaml docs/tasks/administer-cluster/manage-resources</code>
                </a>
                <img src="../../../../../images/copycode.svg" style="max-height:24px" onclick="copyCode('cpu-constraints-yaml')" title="Copy cpu-constraints.yaml to clipboard">
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">apiVersion:<span style="color:#bbb"> </span>v1<span style="color:#bbb">
</span><span style="color:#bbb"></span>kind:<span style="color:#bbb"> </span>LimitRange<span style="color:#bbb">
</span><span style="color:#bbb"></span>metadata:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>name:<span style="color:#bbb"> </span>cpu-min-max-demo-lr<span style="color:#bbb">
</span><span style="color:#bbb"></span>spec:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>-<span style="color:#bbb"> </span>max:<span style="color:#bbb">
</span><span style="color:#bbb">      </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;800m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb">    </span>min:<span style="color:#bbb">
</span><span style="color:#bbb">      </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;200m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb">    </span>type:<span style="color:#bbb"> </span>Container<span style="color:#bbb">
</span><span style="color:#bbb"></span></code></pre></div>  </td>
        </tr>
    </tbody>
</table>

<p>Create the LimitRange:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create -f https://k8s.io/docs/tasks/administer-cluster/cpu-constraints.yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>View detailed information about the LimitRange:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl get limitrange cpu-min-max-demo-lr --output<span style="color:#666">=</span>yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>The output shows the minimum and maximum CPU constraints as expected. But
notice that even though you didn&rsquo;t specify default values in the configuration
file for the LimitRange, they were created automatically.</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">limits:<span style="color:#bbb">
</span><span style="color:#bbb"></span>-<span style="color:#bbb"> </span>default:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>defaultRequest:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>max:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>min:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>200m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>type:<span style="color:#bbb"> </span>Container</code></pre></div>
<p>Now whenever a Container is created in the constraints-cpu-example namespace, Kubernetes
performs these steps:</p>

<ul>
<li><p>If the Container does not specify its own CPU request and limit, assign the default
CPU request and limit to the Container.</p></li>

<li><p>Verify that the Container specifies a CPU request that is greater than or equal to 200 millicpu.</p></li>

<li><p>Verify that the Container specifies a CPU limit that is less than or equal to 800 millicpu.</p></li>
</ul>

<blockquote class="note">
  <div><strong>Note:</strong> When creating a <code>LimitRange</code> object, you can specify limits on huge-pages
or GPUs as well. However, when both <code>default</code> and <code>defaultRequest</code> are specified
on these resources, the two values must be the same.</div>
</blockquote>

<p>Here&rsquo;s the configuration file for a Pod that has one Container. The Container manifest
specifies a CPU request of 500 millicpu and a CPU limit of 800 millicpu. These satisfy the
minimum and maximum CPU constraints imposed by the LimitRange.</p>

<table class="includecode" id="cpu-constraints-pod-yaml">
    <thead>
        <tr>
            <th>
                <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraints-pod.yaml" download="cpu-constraints-pod.yaml">
                    <code>cpu-constraints-pod.yaml docs/tasks/administer-cluster/manage-resources</code>
                </a>
                <img src="../../../../../images/copycode.svg" style="max-height:24px" onclick="copyCode('cpu-constraints-pod-yaml')" title="Copy cpu-constraints-pod.yaml to clipboard">
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">apiVersion:<span style="color:#bbb"> </span>v1<span style="color:#bbb">
</span><span style="color:#bbb"></span>kind:<span style="color:#bbb"> </span>Pod<span style="color:#bbb">
</span><span style="color:#bbb"></span>metadata:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo<span style="color:#bbb">
</span><span style="color:#bbb"></span>spec:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>containers:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>-<span style="color:#bbb"> </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-ctr<span style="color:#bbb">
</span><span style="color:#bbb">    </span>image:<span style="color:#bbb"> </span>nginx<span style="color:#bbb">
</span><span style="color:#bbb">    </span>resources:<span style="color:#bbb">
</span><span style="color:#bbb">      </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;800m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb">      </span>requests:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;500m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb"></span></code></pre></div>  </td>
        </tr>
    </tbody>
</table>

<p>Create the Pod:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create -f https://k8s.io/docs/tasks/administer-cluster/cpu-constraints-pod.yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>Verify that the Pod&rsquo;s Container is running:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl get pod constraints-cpu-demo --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>View detailed information about the Pod:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl get pod constraints-cpu-demo --output<span style="color:#666">=</span>yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>The output shows that the Container has a CPU request of 500 millicpu and CPU limit
of 800 millicpu. These satisfy the constraints imposed by the LimitRange.</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">resources:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>requests:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>500m</code></pre></div>
<h2 id="delete-the-pod">Delete the Pod</h2>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl delete pod constraints-cpu-demo --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<h2 id="attempt-to-create-a-pod-that-exceeds-the-maximum-cpu-constraint">Attempt to create a Pod that exceeds the maximum CPU constraint</h2>

<p>Here&rsquo;s the configuration file for a Pod that has one Container. The Container specifies a
CPU request of 500 millicpu and a cpu limit of 1.5 cpu.</p>

<table class="includecode" id="cpu-constraints-pod-2-yaml">
    <thead>
        <tr>
            <th>
                <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraints-pod-2.yaml" download="cpu-constraints-pod-2.yaml">
                    <code>cpu-constraints-pod-2.yaml docs/tasks/administer-cluster/manage-resources</code>
                </a>
                <img src="../../../../../images/copycode.svg" style="max-height:24px" onclick="copyCode('cpu-constraints-pod-2-yaml')" title="Copy cpu-constraints-pod-2.yaml to clipboard">
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">apiVersion:<span style="color:#bbb"> </span>v1<span style="color:#bbb">
</span><span style="color:#bbb"></span>kind:<span style="color:#bbb"> </span>Pod<span style="color:#bbb">
</span><span style="color:#bbb"></span>metadata:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">2</span><span style="color:#bbb">
</span><span style="color:#bbb"></span>spec:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>containers:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>-<span style="color:#bbb"> </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">2</span>-ctr<span style="color:#bbb">
</span><span style="color:#bbb">    </span>image:<span style="color:#bbb"> </span>nginx<span style="color:#bbb">
</span><span style="color:#bbb">    </span>resources:<span style="color:#bbb">
</span><span style="color:#bbb">      </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;1.5&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb">      </span>requests:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;500m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb"></span></code></pre></div>  </td>
        </tr>
    </tbody>
</table>

<p>Attempt to create the Pod:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create -f https://k8s.io/docs/tasks/administer-cluster/cpu-constraints-pod-2.yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>The output shows that the Pod does not get created, because the Container specifies a CPU limit that is
too large:</p>

<pre><code>Error from server (Forbidden): error when creating &quot;docs/tasks/administer-cluster/cpu-constraints-pod-2.yaml&quot;:
pods &quot;constraints-cpu-demo-2&quot; is forbidden: maximum cpu usage per Container is 800m, but limit is 1500m.
</code></pre>

<h2 id="attempt-to-create-a-pod-that-does-not-meet-the-minimum-cpu-request">Attempt to create a Pod that does not meet the minimum CPU request</h2>

<p>Here&rsquo;s the configuration file for a Pod that has one Container. The Container specifies a
CPU request of 100 millicpu and a CPU limit of 800 millicpu.</p>

<table class="includecode" id="cpu-constraints-pod-3-yaml">
    <thead>
        <tr>
            <th>
                <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraints-pod-3.yaml" download="cpu-constraints-pod-3.yaml">
                    <code>cpu-constraints-pod-3.yaml docs/tasks/administer-cluster/manage-resources</code>
                </a>
                <img src="../../../../../images/copycode.svg" style="max-height:24px" onclick="copyCode('cpu-constraints-pod-3-yaml')" title="Copy cpu-constraints-pod-3.yaml to clipboard">
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">apiVersion:<span style="color:#bbb"> </span>v1<span style="color:#bbb">
</span><span style="color:#bbb"></span>kind:<span style="color:#bbb"> </span>Pod<span style="color:#bbb">
</span><span style="color:#bbb"></span>metadata:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">4</span><span style="color:#bbb">
</span><span style="color:#bbb"></span>spec:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>containers:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>-<span style="color:#bbb"> </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">4</span>-ctr<span style="color:#bbb">
</span><span style="color:#bbb">    </span>image:<span style="color:#bbb"> </span>nginx<span style="color:#bbb">
</span><span style="color:#bbb">    </span>resources:<span style="color:#bbb">
</span><span style="color:#bbb">      </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;800m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb">      </span>requests:<span style="color:#bbb">
</span><span style="color:#bbb">        </span>cpu:<span style="color:#bbb"> </span><span style="color:#b44">&#34;100m&#34;</span><span style="color:#bbb">
</span><span style="color:#bbb"></span></code></pre></div>  </td>
        </tr>
    </tbody>
</table>

<p>Attempt to create the Pod:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create -f https://k8s.io/docs/tasks/administer-cluster/cpu-constraints-pod-3.yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>The output shows that the Pod does not get created, because the Container specifies a CPU
request that is too small:</p>

<pre><code>Error from server (Forbidden): error when creating &quot;docs/tasks/administer-cluster/cpu-constraints-pod-3.yaml&quot;:
pods &quot;constraints-cpu-demo-4&quot; is forbidden: minimum cpu usage per Container is 200m, but request is 100m.
</code></pre>

<h2 id="create-a-pod-that-does-not-specify-any-cpu-request-or-limit">Create a Pod that does not specify any CPU request or limit</h2>

<p>Here&rsquo;s the configuration file for a Pod that has one Container. The Container does not
specify a CPU request, and it does not specify a CPU limit.</p>

<table class="includecode" id="cpu-constraints-pod-4-yaml">
    <thead>
        <tr>
            <th>
                <a href="https://github.com/kubernetes/website/blob/master/content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraints-pod-4.yaml" download="cpu-constraints-pod-4.yaml">
                    <code>cpu-constraints-pod-4.yaml docs/tasks/administer-cluster/manage-resources</code>
                </a>
                <img src="../../../../../images/copycode.svg" style="max-height:24px" onclick="copyCode('cpu-constraints-pod-4-yaml')" title="Copy cpu-constraints-pod-4.yaml to clipboard">
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">apiVersion:<span style="color:#bbb"> </span>v1<span style="color:#bbb">
</span><span style="color:#bbb"></span>kind:<span style="color:#bbb"> </span>Pod<span style="color:#bbb">
</span><span style="color:#bbb"></span>metadata:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">4</span><span style="color:#bbb">
</span><span style="color:#bbb"></span>spec:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>containers:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>-<span style="color:#bbb"> </span>name:<span style="color:#bbb"> </span>constraints-cpu-demo-<span style="color:#666">4</span>-ctr<span style="color:#bbb">
</span><span style="color:#bbb">    </span>image:<span style="color:#bbb"> </span>vish/stress<span style="color:#bbb">
</span><span style="color:#bbb"></span></code></pre></div>  </td>
        </tr>
    </tbody>
</table>

<p>Create the Pod:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl create -f https://k8s.io/docs/tasks/administer-cluster/cpu-constraints-pod-4.yaml --namespace<span style="color:#666">=</span>constraints-cpu-example</code></pre></div>
<p>View detailed information about the Pod:</p>

<pre><code>kubectl get pod constraints-cpu-demo-4 --namespace=constraints-cpu-example --output=yaml
</code></pre>

<p>The output shows that the Pod&rsquo;s Container has a CPU request of 800 millicpu and a CPU limit of 800 millicpu.
How did the Container get those values?</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml">resources:<span style="color:#bbb">
</span><span style="color:#bbb">  </span>limits:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m<span style="color:#bbb">
</span><span style="color:#bbb">  </span>requests:<span style="color:#bbb">
</span><span style="color:#bbb">    </span>cpu:<span style="color:#bbb"> </span>800m</code></pre></div>
<p>Because your Container did not specify its own CPU request and limit, it was given the
<a href="../../cpu-default-namespace/index.html">default CPU request and limit</a>
from the LimitRange.</p>

<p>At this point, your Container might be running or it might not be running. Recall that a prerequisite
for this task is that your Nodes have at least 1 CPU. If each of your Nodes has only
1 CPU, then there might not be enough allocatable CPU on any Node to accommodate a request
of 800 millicpu. If you happen to be using Nodes with 2 CPU, then you probably have
enough CPU to accommodate the 800 millicpu request.</p>

<p>Delete your Pod:</p>

<pre><code>kubectl delete pod constraints-cpu-demo-4 --namespace=constraints-cpu-example
</code></pre>

<h2 id="enforcement-of-minimum-and-maximum-cpu-constraints">Enforcement of minimum and maximum CPU constraints</h2>

<p>The maximum and minimum CPU constraints imposed on a namespace by a LimitRange are enforced only
when a Pod is created or updated. If you change the LimitRange, it does not affect
Pods that were created previously.</p>

<h2 id="motivation-for-minimum-and-maximum-cpu-constraints">Motivation for minimum and maximum CPU constraints</h2>

<p>As a cluster administrator, you might want to impose restrictions on the CPU resources that Pods can use.
For example:</p>

<ul>
<li><p>Each Node in a cluster has 2 CPU. You do not want to accept any Pod that requests
more than 2 CPU, because no Node in the cluster can support the request.</p></li>

<li><p>A cluster is shared by your production and development departments.
You want to allow production workloads to consume up to 3 CPU, but you want development workloads to be limited
to 1 CPU. You create separate namespaces for production and development, and you apply CPU constraints to
each namespace.</p></li>
</ul>

<h2 id="clean-up">Clean up</h2>

<p>Delete your namespace:</p>
<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">kubectl delete namespace constraints-cpu-example</code></pre></div>
















<h2 id="what-s-next">What&#39;s next</h2>
<h3 id="for-cluster-administrators">For cluster administrators</h3>

<ul>
<li><p><a href="../../memory-default-namespace/index.html">Configure Default Memory Requests and Limits for a Namespace</a></p></li>

<li><p><a href="../../cpu-default-namespace/index.html">Configure Default CPU Requests and Limits for a Namespace</a></p></li>

<li><p><a href="../../memory-constraint-namespace/index.html">Configure Minimum and Maximum Memory Constraints for a Namespace</a></p></li>

<li><p><a href="../../quota-memory-cpu-namespace/index.html">Configure Memory and CPU Quotas for a Namespace</a></p></li>

<li><p><a href="../../quota-pod-namespace/index.html">Configure a Pod Quota for a Namespace</a></p></li>

<li><p><a href="../../quota-api-object/index.html">Configure Quotas for API Objects</a></p></li>
</ul>

<h3 id="for-app-developers">For app developers</h3>

<ul>
<li><p><a href="../../../configure-pod-container/assign-cpu-ram-container">Assign Memory Resources to Containers and Pods</a></p></li>

<li><p><a href="../../../configure-pod-container/assign-cpu-resource/index.html">Assign CPU Resources to Containers and Pods</a></p></li>

<li><p><a href="../../../configure-pod-container/quality-service-pod/index.html">Configure Quality of Service for Pods</a></p></li>
</ul>






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